1974: (L-R) Singer and pianist Burton Cummings, drummer Garry Peterson, guitarist Domenic Troiano and bassist Bill Wallace of the rock band "The Guess Who" pose for a portrait in 1974. (Photo by Michael Ochs Archives/Getty Images)
Singer/Songwriters/Musicians Dewey Bunnell, Gerry Beckley and Dan Peek, members of musical group America at Universal City, CA 1975. (Photo by Mark Sullivan/Getty Images)
1975: Singer and songwriter C.W. McCall (William Dale Fries, Jr.) poses for an MGM Records publicity still in 1975. (Photo by Michael Ochs Archives/Getty Images)
OAKLAND – APRIL 5: Rick Davies and Dougie Thomson perform with Supertramp at the Oakland Coliseum on April 5, 1979 in Oakland, California. (Photo by Ed Perlstein/Redferns/Getty Images)
Pink Floyd playing on the stage surrounded with a smoke and illuminated with a red stage lights during the concert at Merriweather Post Pavilion, Columbia, Maryland in June 1973, July, 1973. Image courtesy National Archives. (Photo by Smith Collection/Gado/Getty Images)
